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-   -   What are the differences between mass specs? (http://www.molecularstation.com/forum/mass-spectrometry-forum/36536-what-differences-between-mass-specs.html)

Graeme Beattie 11-12-2008 03:41 PM

What are the differences between mass specs?
 
Hello

I was wondering what the differences were between time of flight, quadrupole, and sector mass spectrometers? I know that they use different processes to separate the ions but what are the advantages and disadvatages to using one over the other.

MoverZ 01-25-2009 09:33 PM

Re: What are the differences between mass specs?
 
To understand the strengths of each, it's important to understand how each type works.

I really can't do a better job of explaining than this site does: masspec.scripps.edu/mshistory/whatisms_toc.php Just click on the Mass Analyzers link, and get comfortable. There is a ton of info here, and these guys are very knowledgeable.

Forgive any small molecule bias I have but here is the short story: TOF is good at determining mass more precisely, Triple quadrupoles are good for quantitation, Ion traps are good for structure/metabolite ID using. I'm not sure that magnetic sector ms is used much these days.


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